AA01A a-Baratron® Absolute Capacitance Manometer
(1 - 1000 Torr)

photo - a-Baratron Capacitance Manometer

The MKS a-Baratron® manometer is an advanced high-performance absolute unheated capacitance manometer developed specifically for use in vacuum and pressure measurement applications where accuracy and repeatability are crucial to process success. They use state-of-the-art digital architecture throughout to produce the highest possible long-term performance and reliability. These manometers operate on +15 VDC to +30 VDC input voltage, and have a standard 0 to 10 VDC analog output signal. Full Scale measurement ranges from 1Torr (133.3 Pa) to 1000 Torr (133.3 kPa) are available.

Features & Benefits:

  • All products are specified in percent of reading for best accuracy and improved process yield
  • Direct measurement of chamber total pressure independent of gas type or composition, eliminating need for lookup tables and conversion factors
  • Best-available long-term output stability ensures state-of-the-art process repeatability in nearly any application
  • Inconel® and Incoloy® nickel alloy construction of basic sensor operates without damage in virtually any chemical environment, including halogens, deionized water and steam, and ozone
  • High overpressure limit ensures reliability from occasional system mishaps
  • Push button zeroing


a-Baratron® manometers are used in a wide variety of applications including vacuum furnaces, freeze-drying of fruits and vegetables, gas lasers, automotive component testing, bottle coatings, and vacuum distillation.

Below are common configurations of this product. Contact an application specialist for additional configurations.


Purchase now or request a quote:
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Part NumberFull Scale RangeSensor TypeFittingElectricalPriceQTY
AA01A01TGAS3B000001 TorrStandardKF16 15-pin D-subminiature, 24VDCQuote Only
AA01A11TBAS3B0000010 TorrStandardTube 15-pin D-subminiature, 24VDCQuote Only
AA01A12TGCS3B00000100 TorrStandardKF25 15-pin D-subminiature, 24VDCQuote Only
AA01A13TGAS3B000001000 TorrStandardKF16 15-pin D-subminiature, 24VDCQuote Only

Need help?

Contact an Applications Specialist by sending an email to MKS Instruments, or call 978-645-5500.